APPARATUS AND METHODS FOR TRIGGERING ROW HAMMER ADDRESS SAMPLING
First Claim
1. An apparatus comprising:
- an oscillator circuit configured to provide a clock signal; and
a filter circuit including;
a control circuit configured to receive pulses of the clock signal and provide an output signal that represents a count number by counting a number of pulses of the clock signal and control a probability of enabling the output signal based on the count number; and
a logic gate configured to pass one of the pulses of the clock signal responsive to the output signal from the control circuit being enabled and filter another of the pulsesresponsive to the output signal from the control circuit being not enabled.
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Accused Products
Abstract
Apparatuses and methods for triggering row hammer address sampling are described. An example apparatus includes an oscillator circuit configured to provide a clock signal, and a filter circuit. The filter circuit includes a control circuit configured to receive pulses of the clock signal and provide an output signal that represents a count number by counting a number of pulses of the clock signal and control a probability of enabling the output signal based on the count number. The filter circuit further includes a logic gate configured to pass one of the pulses of the clock signal responsive to the output signal from the control circuit being enabled and filter another of the pulses responsive to the output signal from the control circuit being not enabled
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Citations
20 Claims
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1. An apparatus comprising:
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an oscillator circuit configured to provide a clock signal; and a filter circuit including; a control circuit configured to receive pulses of the clock signal and provide an output signal that represents a count number by counting a number of pulses of the clock signal and control a probability of enabling the output signal based on the count number; and a logic gate configured to pass one of the pulses of the clock signal responsive to the output signal from the control circuit being enabled and filter another of the pulses responsive to the output signal from the control circuit being not enabled. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus comprising:
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a row hammer control circuit configured to provide a row hammer control signal that indicates a start of a row hammer interval; a sampling timing generator circuit configured to provide pulses on an trigger sample signal to trigger time-based samples of row addresses in response to the row hammer control signal, wherein the sampling timing generator circuit comprises a filter circuit that is configured to adjust a probability of providing the pulses on the trigger sample signal based on count of previous pulses of the trigger sample signal within the row hammer interval; and a time-based sampling circuit configured to initiate a respective sample of a row address in response to each of the pulses of the trigger sample signal, wherein a probability of capturing a valid row address is constant for each of the pulses of the trigger sample signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
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receiving a plurality of pulses of a clock signal at a sampling timing generator circuit of a memory; adjusting a count value in response each pulse of the plurality of pulses of the clock signal; setting an output signal based on the count value, wherein a probability of setting the output signal is based on the count value; and providing a pulse of the plurality of pulses of the clock signal in response to the output signal being set. - View Dependent Claims (17, 18, 19, 20)
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Specification